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        <p><excerpt in="" index="" |="" 首页摘要=""><br><a id="more"></a></excerpt></p>
<the rest="" of="" contents="" |="" 余下全文="">

<h3 id="10-网络编程–Netty-基础-WebSocket"><a href="#10-网络编程–Netty-基础-WebSocket" class="headerlink" title="10.网络编程–Netty-基础-WebSocket"></a>10.网络编程–Netty-基础-WebSocket</h3><h5 id="序言"><a href="#序言" class="headerlink" title="序言"></a>序言</h5><p>websocket介绍<br>websocket是HTML5开始提供的一中浏览器与服务器进行全双工通信的网络协议。在websocket API中，浏览器与服务器只需要做一个握手的动作，然后，浏览器和服务器就形成了一条快速通道，两者就可以直接互相传送数据。websocket基于TCP双向全双工进行消息传递，在同一时刻，既可以发送消息，也可以接受消息。</p>
<p>其主要特点如下：</p>
<ol>
<li>单一的TCP连接，采用全双工模式通信;</li>
<li>无头部信息、cookie和身份验证;</li>
<li>无安全开销;</li>
<li>服务器可以主动传递消息给客户端，不在需要客户端轮询。</li>
</ol>
<hr>
<ol>
<li>：网络编程–Netty-基础-WebSocket</li>
</ol>
<hr>
<h5 id="服务端开发"><a href="#服务端开发" class="headerlink" title="服务端开发"></a>服务端开发</h5><ul>
<li>WebSocket在建立握手连接时，数据是通过http协议传输的；但是在建立连接之后，真正的数据传输阶段是不需要http协议参与的。(ps：Websocket与HTTP、TCP的关系可以参考博文：<a href="http://blog.csdn.net/linwei_1029/article/details/47836249" target="_blank" rel="noopener">http://blog.csdn.net/linwei_1029/article/details/47836249</a>)<h5 id="看下示例："><a href="#看下示例：" class="headerlink" title="看下示例："></a>看下示例：</h5><h5 id="说明："><a href="#说明：" class="headerlink" title="说明："></a>说明：</h5><h5 id="首先工程需要引入netty的jar包"><a href="#首先工程需要引入netty的jar包" class="headerlink" title="首先工程需要引入netty的jar包"></a>首先工程需要引入netty的jar包</h5><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>io.netty<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>netty-all<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">version</span>&gt;</span>5.0.0.Alpha2<span class="tag">&lt;/<span class="name">version</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br></pre></td></tr></table></figure>
</li>
</ul>
<h5 id="第一步：服务端开发-WebSocketServer启动类。"><a href="#第一步：服务端开发-WebSocketServer启动类。" class="headerlink" title="第一步：服务端开发 WebSocketServer启动类。"></a>第一步：服务端开发 WebSocketServer启动类。</h5><ul>
<li>websocket服务端的功能如下：服务端对请求的消息进行判断，如果第一次请求为http请求，进行握手连接；如果为合法的websocket，获取请求的消息文本，在其前面追加字符串”服务器收到并返回：。</li>
</ul>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">WebSocketServer</span> </span>&#123;</span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">run</span><span class="params">(<span class="keyword">int</span> port)</span> <span class="keyword">throws</span> Exception </span>&#123;</span><br><span class="line">        EventLoopGroup bossGroup = <span class="keyword">new</span> NioEventLoopGroup();</span><br><span class="line">        EventLoopGroup workerGroup = <span class="keyword">new</span> NioEventLoopGroup();</span><br><span class="line">        <span class="keyword">try</span> &#123;</span><br><span class="line">            ServerBootstrap b = <span class="keyword">new</span> ServerBootstrap();</span><br><span class="line">            b.group(bossGroup, workerGroup)</span><br><span class="line">                    .channel(NioServerSocketChannel.class)</span><br><span class="line">                    .childHandler(<span class="keyword">new</span> ChannelInitializer&lt;SocketChannel&gt;() &#123;</span><br><span class="line"></span><br><span class="line">                        <span class="meta">@Override</span></span><br><span class="line">                        <span class="function"><span class="keyword">protected</span> <span class="keyword">void</span> <span class="title">initChannel</span><span class="params">(SocketChannel ch)</span></span></span><br><span class="line"><span class="function">                                <span class="keyword">throws</span> Exception </span>&#123;</span><br><span class="line">                            ChannelPipeline pipeline = ch.pipeline();</span><br><span class="line">                            <span class="comment">//表示将请求和应答的消息编码或者解码为HTTP消息；</span></span><br><span class="line">                            pipeline.addLast(<span class="string">"http-codec"</span>, <span class="keyword">new</span> HttpServerCodec());</span><br><span class="line">                            <span class="comment">//表示将HTTP消息的多个部分组合成一条完整的HTTP消息；</span></span><br><span class="line">                            pipeline.addLast(<span class="string">"aggregator"</span>, <span class="keyword">new</span> HttpObjectAggregator(<span class="number">65536</span>));</span><br><span class="line">                            <span class="comment">//表示向客户端发送HTML5文件，主要用于支持浏览器和服务端进行websocket通信</span></span><br><span class="line">                            ch.pipeline().addLast(<span class="string">"http-chunked"</span>, <span class="keyword">new</span> ChunkedWriteHandler());</span><br><span class="line">                            <span class="comment">//表示增加消息的Handler处理类WebSocketServerHandler</span></span><br><span class="line">                            pipeline.addLast(<span class="string">"handler"</span>, <span class="keyword">new</span> WebSocketServerHandler());</span><br><span class="line">                        &#125;</span><br><span class="line">                    &#125;);</span><br><span class="line"></span><br><span class="line">            Channel ch = b.bind(port).sync().channel();</span><br><span class="line">            System.out.println(<span class="string">"Web socket server started at port "</span> + port + <span class="string">'.'</span>);</span><br><span class="line">            System.out.println(<span class="string">"Open your browser and navigate to http://localhost:"</span> + port + <span class="string">'/'</span>);</span><br><span class="line"></span><br><span class="line">            ch.closeFuture().sync();</span><br><span class="line">        &#125; <span class="keyword">finally</span> &#123;</span><br><span class="line">            bossGroup.shutdownGracefully();</span><br><span class="line">            workerGroup.shutdownGracefully();</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">main</span><span class="params">(String[] args)</span> <span class="keyword">throws</span> Exception </span>&#123;</span><br><span class="line"></span><br><span class="line">        <span class="keyword">new</span> WebSocketServer().run(<span class="number">8765</span>);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h5 id="第二步-服务端开发-WebSocket服务端处理类"><a href="#第二步-服务端开发-WebSocket服务端处理类" class="headerlink" title="第二步 服务端开发 WebSocket服务端处理类"></a>第二步 服务端开发 WebSocket服务端处理类</h5><ul>
<li>在服务端处理类中需要处理两种类型的消息，一种的HTTP请求，一种是WebSocket请求；因为WebSocket在建立连接时需要HTTP协议的参与，所有第一次请求消息是由HTTP消息承载。</li>
</ul>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">WebSocketServerHandler</span> <span class="keyword">extends</span> <span class="title">SimpleChannelInboundHandler</span>&lt;<span class="title">Object</span>&gt; </span>&#123;</span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">final</span> Logger logger = Logger.getLogger(WebSocketServerHandler.class.getName());</span><br><span class="line"></span><br><span class="line">    <span class="keyword">private</span> WebSocketServerHandshaker handshaker;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">messageReceived</span><span class="params">(ChannelHandlerContext ctx, Object msg)</span></span></span><br><span class="line"><span class="function">	    <span class="keyword">throws</span> Exception </span>&#123;</span><br><span class="line">		<span class="comment">// 传统的HTTP接入 HTTP接入，WebSocket第一次连接使用HTTP连接,用于握手</span></span><br><span class="line">		<span class="keyword">if</span> (msg <span class="keyword">instanceof</span> FullHttpRequest) &#123;</span><br><span class="line">		    handleHttpRequest(ctx, (FullHttpRequest) msg);</span><br><span class="line">		&#125;</span><br><span class="line">		<span class="comment">// WebSocket接入</span></span><br><span class="line">		<span class="keyword">else</span> <span class="keyword">if</span> (msg <span class="keyword">instanceof</span> WebSocketFrame) &#123;</span><br><span class="line">		    handleWebSocketFrame(ctx, (WebSocketFrame) msg);</span><br><span class="line">		&#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">channelReadComplete</span><span class="params">(ChannelHandlerContext ctx)</span> <span class="keyword">throws</span> Exception </span>&#123;</span><br><span class="line">    	ctx.flush();</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">private</span> <span class="keyword">void</span> <span class="title">handleHttpRequest</span><span class="params">(ChannelHandlerContext ctx, FullHttpRequest req)</span> <span class="keyword">throws</span> Exception </span>&#123;</span><br><span class="line">		<span class="comment">// 如果HTTP解码失败，返回HHTP异常</span></span><br><span class="line">		<span class="keyword">if</span> (!req.decoderResult().isSuccess()</span><br><span class="line">			|| (!<span class="string">"websocket"</span>.equals(req.headers().get(<span class="string">"Upgrade"</span>)))) &#123;</span><br><span class="line">		    sendHttpResponse(ctx, req, <span class="keyword">new</span> DefaultFullHttpResponse(HTTP_1_1, BAD_REQUEST));</span><br><span class="line">		    <span class="keyword">return</span>;</span><br><span class="line">		&#125;</span><br><span class="line"></span><br><span class="line">		<span class="comment">// 构造握手响应返回，本机测试</span></span><br><span class="line">		WebSocketServerHandshakerFactory wsFactory = <span class="keyword">new</span> WebSocketServerHandshakerFactory(<span class="string">"ws://localhost:8080/websocket"</span>, <span class="keyword">null</span>, <span class="keyword">false</span>);</span><br><span class="line">		handshaker = wsFactory.newHandshaker(req);</span><br><span class="line"></span><br><span class="line">		<span class="keyword">if</span> (handshaker == <span class="keyword">null</span>) &#123;</span><br><span class="line">		    WebSocketServerHandshakerFactory.sendUnsupportedVersionResponse(ctx.channel());</span><br><span class="line">		&#125; <span class="keyword">else</span> &#123;</span><br><span class="line">		    handshaker.handshake(ctx.channel(), req);</span><br><span class="line">		&#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">private</span> <span class="keyword">void</span> <span class="title">handleWebSocketFrame</span><span class="params">(ChannelHandlerContext ctx, WebSocketFrame frame)</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">		<span class="comment">// 判断是否是关闭链路的指令</span></span><br><span class="line">		<span class="keyword">if</span> (frame <span class="keyword">instanceof</span> CloseWebSocketFrame) &#123;</span><br><span class="line">		    handshaker.close(ctx.channel(), (CloseWebSocketFrame) frame.retain());</span><br><span class="line">		    <span class="keyword">return</span>;</span><br><span class="line">		&#125;</span><br><span class="line">		<span class="comment">// 判断是否是Ping消息</span></span><br><span class="line">		<span class="keyword">if</span> (frame <span class="keyword">instanceof</span> PingWebSocketFrame) &#123;</span><br><span class="line">		    ctx.channel().write(<span class="keyword">new</span> PongWebSocketFrame(frame.content().retain()));</span><br><span class="line">		    <span class="keyword">return</span>;</span><br><span class="line">		&#125;</span><br><span class="line">		<span class="comment">// 本例程仅支持文本消息，不支持二进制消息</span></span><br><span class="line">		<span class="keyword">if</span> (!(frame <span class="keyword">instanceof</span> TextWebSocketFrame)) &#123;</span><br><span class="line">		    <span class="keyword">throw</span> <span class="keyword">new</span> UnsupportedOperationException(String.format(<span class="string">"%s frame types not supported"</span>, frame.getClass().getName()));</span><br><span class="line">		&#125;</span><br><span class="line"></span><br><span class="line">		<span class="comment">// 返回应答消息</span></span><br><span class="line">		String request = ((TextWebSocketFrame) frame).text();</span><br><span class="line">		<span class="keyword">if</span> (logger.isLoggable(Level.FINE)) &#123;</span><br><span class="line">		    logger.fine(String.format(<span class="string">"%s received %s"</span>, ctx.channel(), request));</span><br><span class="line">		&#125;</span><br><span class="line">		ctx.channel().write(</span><br><span class="line">			<span class="keyword">new</span> TextWebSocketFrame(request + <span class="string">" , 欢迎使用Netty WebSocket服务，现在时刻："</span> + <span class="keyword">new</span> java.util.Date().toString()));</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">sendHttpResponse</span><span class="params">(ChannelHandlerContext ctx, FullHttpRequest req, FullHttpResponse res)</span> </span>&#123;</span><br><span class="line">		<span class="comment">// 返回应答给客户端</span></span><br><span class="line">		<span class="keyword">if</span> (res.status().code() != <span class="number">200</span>) &#123;</span><br><span class="line">		    ByteBuf buf = Unpooled.copiedBuffer(res.status().toString(), CharsetUtil.UTF_8);</span><br><span class="line">		    res.content().writeBytes(buf);</span><br><span class="line">		    buf.release();</span><br><span class="line">		    HttpHeaderUtil.setContentLength(res, res.content().readableBytes());</span><br><span class="line">		&#125;</span><br><span class="line"></span><br><span class="line">		<span class="comment">// 如果是非Keep-Alive，关闭连接</span></span><br><span class="line">		ChannelFuture f = ctx.channel().writeAndFlush(res);</span><br><span class="line">		<span class="keyword">if</span> (!HttpHeaderUtil.isKeepAlive(req) || res.status().code() != <span class="number">200</span>) &#123;</span><br><span class="line">		    f.addListener(ChannelFutureListener.CLOSE);</span><br><span class="line">		&#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">exceptionCaught</span><span class="params">(ChannelHandlerContext ctx, Throwable cause)</span></span></span><br><span class="line"><span class="function">	    <span class="keyword">throws</span> Exception </span>&#123;</span><br><span class="line">		cause.printStackTrace();</span><br><span class="line">		ctx.close();</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h5 id="第4步-就是编写客户端连接服务端的代码"><a href="#第4步-就是编写客户端连接服务端的代码" class="headerlink" title="第4步 就是编写客户端连接服务端的代码"></a>第4步 就是编写客户端连接服务端的代码</h5><ul>
<li>客户端负责连接服务端 只会进行发送数据，在这里是一个页面实现的</li>
</ul>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">head</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">title</span>&gt;</span>Netty WebSocket DEMO<span class="tag">&lt;/<span class="name">title</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">head</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;<span class="name">body</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">script</span> <span class="attr">type</span>=<span class="string">"text/javascript"</span>&gt;</span><span class="undefined"></span></span><br><span class="line"><span class="undefined">        var socket;</span></span><br><span class="line"><span class="undefined">        if (!window.WebSocket) &#123;</span></span><br><span class="line"><span class="undefined">            window.WebSocket = window.MozWebSocket;</span></span><br><span class="line"><span class="undefined">        &#125;</span></span><br><span class="line"><span class="undefined">        if (window.WebSocket) &#123;</span></span><br><span class="line"><span class="undefined">            socket = new WebSocket("ws://localhost:2048/ws");</span></span><br><span class="line"><span class="undefined">            socket.onmessage = function(event) &#123;</span></span><br><span class="line"><span class="undefined">                var ta = document.getElementById('responseText');</span></span><br><span class="line"><span class="undefined">                ta.value = ta.value + '\n' + event.data</span></span><br><span class="line"><span class="undefined">            &#125;;</span></span><br><span class="line"><span class="undefined">            socket.onopen = function(event) &#123;</span></span><br><span class="line"><span class="undefined">                var ta = document.getElementById('responseText');</span></span><br><span class="line"><span class="undefined">                ta.value = "连接开启!";</span></span><br><span class="line"><span class="undefined">            &#125;;</span></span><br><span class="line"><span class="undefined">            socket.onclose = function(event) &#123;</span></span><br><span class="line"><span class="undefined">                var ta = document.getElementById('responseText');</span></span><br><span class="line"><span class="undefined">                ta.value = ta.value + "连接被关闭";</span></span><br><span class="line"><span class="undefined">            &#125;;</span></span><br><span class="line"><span class="undefined">        &#125; else &#123;</span></span><br><span class="line"><span class="undefined">            alert("你的浏览器不支持！");</span></span><br><span class="line"><span class="undefined">        &#125;</span></span><br><span class="line"><span class="undefined"></span></span><br><span class="line"><span class="undefined">        function send(message) &#123;</span></span><br><span class="line"><span class="undefined">            if (!window.WebSocket) &#123;</span></span><br><span class="line"><span class="undefined">                return;</span></span><br><span class="line"><span class="undefined">            &#125;</span></span><br><span class="line"><span class="undefined">            if (socket.readyState == WebSocket.OPEN) &#123;</span></span><br><span class="line"><span class="undefined">                socket.send(message);</span></span><br><span class="line"><span class="undefined">            &#125; else &#123;</span></span><br><span class="line"><span class="undefined">                alert("连接没有开启.");</span></span><br><span class="line"><span class="undefined">            &#125;</span></span><br><span class="line"><span class="undefined">        &#125;</span></span><br><span class="line"><span class="undefined">    </span><span class="tag">&lt;/<span class="name">script</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">form</span> <span class="attr">onsubmit</span>=<span class="string">"return false;"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">input</span> <span class="attr">type</span>=<span class="string">"text"</span> <span class="attr">name</span>=<span class="string">"message"</span> <span class="attr">value</span>=<span class="string">"Hello, World!"</span>&gt;</span><span class="tag">&lt;<span class="name">input</span></span></span><br><span class="line"><span class="tag">            <span class="attr">type</span>=<span class="string">"button"</span> <span class="attr">value</span>=<span class="string">"发送消息"</span></span></span><br><span class="line"><span class="tag">            <span class="attr">onclick</span>=<span class="string">"send(this.form.message.value)"</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">h3</span>&gt;</span>输出：<span class="tag">&lt;/<span class="name">h3</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">textarea</span> <span class="attr">id</span>=<span class="string">"responseText"</span> <span class="attr">style</span>=<span class="string">"width: 500px; height: 300px;"</span>&gt;</span><span class="tag">&lt;/<span class="name">textarea</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">input</span> <span class="attr">type</span>=<span class="string">"button"</span> <span class="attr">onclick</span>=<span class="string">"javascript:document.getElementById('responseText').value=''"</span> <span class="attr">value</span>=<span class="string">"清空"</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">form</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">body</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">html</span>&gt;</span></span><br></pre></td></tr></table></figure>
<h5 id="Client发送数据："><a href="#Client发送数据：" class="headerlink" title="Client发送数据："></a>Client发送数据：</h5><figure class="highlight"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">maoge</span><br></pre></td></tr></table></figure>
<h5 id="Client端输出结果："><a href="#Client端输出结果：" class="headerlink" title="Client端输出结果："></a>Client端输出结果：</h5><figure class="highlight"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">maoge , 欢迎使用Netty WebSocket服务，现在时刻：Sun Jul 08 15:42:04 CST 2018</span><br></pre></td></tr></table></figure>
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        <p><span>本文标题:</span><a href="/maoge-blog/2018/05/05/花神(maoge)/2.网络编程/10.网络编程--Netty-基础-WebSocket/">10.网络编程--Netty-基础-WebSocket</a></p>
        <p><span>文章作者:</span><a href="/" title="回到主页">zhengweiMao</a></p>
        <p><span>发布时间:</span>2018-05-05, 02:01:31</p>
        <p><span>最后更新:</span>2018-08-06, 23:27:12</p>
        <p>
            <span>原始链接:</span><a class="post-url" href="/maoge-blog/2018/05/05/花神(maoge)/2.网络编程/10.网络编程--Netty-基础-WebSocket/" title="10.网络编程--Netty-基础-WebSocket">https://maozw.gitee.io/maoge-blog/2018/05/05/花神(maoge)/2.网络编程/10.网络编程--Netty-基础-WebSocket/</a>
            <span class="copy-path" data-clipboard-text="原文: https://maozw.gitee.io/maoge-blog/2018/05/05/花神(maoge)/2.网络编程/10.网络编程--Netty-基础-WebSocket/　　作者: zhengweiMao" title="点击复制文章链接"><i class="fa fa-clipboard"></i></span>
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            <span>许可协议:</span><i class="fa fa-creative-commons"></i> <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/" title="CC BY-NC-SA 4.0 International" target = "_blank">"署名-非商用-相同方式共享 4.0"</a> 转载请保留原文链接及作者。
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            <ol class="toc"><li class="toc-item toc-level-3"><a class="toc-link" href="#10-网络编程–Netty-基础-WebSocket"><span class="toc-number">1.</span> <span class="toc-text">10.网络编程–Netty-基础-WebSocket</span></a><ol class="toc-child"><li class="toc-item toc-level-5"><a class="toc-link" href="#序言"><span class="toc-number">1.0.1.</span> <span class="toc-text">序言</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#服务端开发"><span class="toc-number">1.0.2.</span> <span class="toc-text">服务端开发</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#看下示例："><span class="toc-number">1.0.3.</span> <span class="toc-text">看下示例：</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#说明："><span class="toc-number">1.0.4.</span> <span class="toc-text">说明：</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#首先工程需要引入netty的jar包"><span class="toc-number">1.0.5.</span> <span class="toc-text">首先工程需要引入netty的jar包</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#第一步：服务端开发-WebSocketServer启动类。"><span class="toc-number">1.0.6.</span> <span class="toc-text">第一步：服务端开发 WebSocketServer启动类。</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#第二步-服务端开发-WebSocket服务端处理类"><span class="toc-number">1.0.7.</span> <span class="toc-text">第二步 服务端开发 WebSocket服务端处理类</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#第4步-就是编写客户端连接服务端的代码"><span class="toc-number">1.0.8.</span> <span class="toc-text">第4步 就是编写客户端连接服务端的代码</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#Client发送数据："><span class="toc-number">1.0.9.</span> <span class="toc-text">Client发送数据：</span></a></li><li class="toc-item toc-level-5"><a class="toc-link" href="#Client端输出结果："><span class="toc-number">1.0.10.</span> <span class="toc-text">Client端输出结果：</span></a></li></ol></li></ol></li></ol>
        
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